Flickr Trend?: Transparent Desktops

We've spotted tons of people doing this on Flickr. They're setting up their desktop images to match what's behind them, making the computer screen look transparent. Are we missing something? Has this been done for, like, ever? The "special effect" is suprising, and the idea does its little part in reducing the interruption of space. We think we like it. See more examples of what appears to be an epidemic after the jump...